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1 definition by h3rt@

 
1.
SMART MOUTH IDIOT FLIP FLOP.

It's when a person who is an idiot starts running their smart mouth while looking like a damn fool wearing flip flops.
"Look at that SMIFF over there talking about garbage he don't know about"

"He is the biggest SMIFF I know"
by h3rt@ November 24, 2011